关键词: 鲕状赤铁矿, 还原焙烧, 弱磁选, 磁选柱

Abstract: Xuanlong-type oolitic hematite consists of aphanitic hematite with particle size of 0.005 ~ 0.001 mm, and iron element in hematite accounts for 96.19% of the total iron, and the contents of harmful elements S , P are low. The exploitation scheme for the ore is investigated to find out a process with feature of simple process, low energy consumption and good operability as a goal. The results show that iron concentrate with Fe grade of 62.46% and recovery rate of 83.56% was achieved by adopting the process of reduction roasting-grinding-rough low intensity magnetic separation-regrinding of rough concentrate-cleaning of low intensity magnetic separation.

Key words: Oolitic hematite ore, Reduction roasting, Low intensity magnetic separation, Magnetic separation column